Curium (Cm)

General Properties

Symbol Cm
Atomic Number 96
Atomic Weight (247)
Group
(Actinoids)
Solid, Actinide, Radioactive, Synthetic
Period 7
Block f

Physical Properties

Density 13.5 g/cm3
Atomic Volume 18.3 cm3/mole
Atomic Radius --
Covalent Radius --
Crust Abundance None
Crystal Structure Hexagonal
Color Silver

Energy

Electronegativity 1.3 (Pauling Scale)
Electron Affinity --
1st Ionization Energy 581 kJ/mol
Specific Heat Capacity J g−1 K−1
Thermal Conductivity 10.0 W·m−1·K−1

Electrons & Oxidation

Oxidation States 3
Electrons Per Shell 2 8 18 32 25 9 2
Electron Configuration [Rn] 5f7 6d1 7s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f7 6d1 7s2
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5f
↿ 
↿ 
↿ 
↿ 
↿ 
↿ 
↿ 
6s
↿⇂
6p
↿⇂
↿⇂
↿⇂
6d
↿ 
 
 
 
 
6f
 
 
 
 
 
 
 
7s
↿⇂
7p
 
 
 
7d
 
 
 
 
 
7f
 
 
 
 
 
 
 

Nuclear

Radioactive Yes
Half Life 1.56×107
Lifetime 2.25×107y
Decay Alpha Emission

Media

Planetary Bohr Model of Curium (Cm)
Lewis Dot Diagram of Curium (Cm)
Description
Silvery, malleable, synthetic radioactive metal.
Uses
It has no significant commercial applications.
Sources
Made by bombarding plutonium with helium ions. So radioactive it glows in the dark.
Pronounciation (English)
KYOOR-i-em

Translations

Afrikaans Kurium
Aragonese Curio
العربية كوريوم
Armãneashte Chiriumu
asturianu Curiu
azərbaycan dili Kürium
български Кюрий
বাংলা কুরিয়াম
brezhoneg Kuriom
bosanski Curijum, ²Kirij
Byelorussian Кюрый
Cebuano Curyo
čeština Curium
Chuvash Кюри
Cymraeg Curi
dansk Curium
Deutsch Kurium
Ελληνικά Κιουριο
English Curium
esperanto Kuriumo
español Curio
eesti Kuurium
euskara Kurioa
فارسی کوریم
suomi Curium
føroyskt Kurium
français Curium
furlan Curi
West-Frysk Curium
Gaeilge Ciúiriam
Gàidhlig Cùriam
galego Curio
ગુજરાતી ક્યૂરિયમનો
Gaelg Curium
Hakka Chinese Khiu̍k (鋦)
עברית קיוריום
हिन्दी क्यूरियम
hrvatski Kurij
magyar Kûrium
հայերեն Կյուրիում
Indonesia Kurium
íslenska Kúrín
italiano Curio
日本語 キュリウム
ქართული კიურიუმი
کٲشُر Czur
қазақ тілі Кюрий
한국어 퀴륨
Kurdish Küryûm
Komi Кюрий
kernewek Curyum
кыргызча Кюрий
Latin Curium
Lëtzebuergesch Kurium
Lombard Cüri
lingála Kolumu
lietuvių Kiuris
latviešu Kirijs
Mari Кюрий
Maori Curium
македонски Кириум
മലയാളം ക്യൂറിയം
монгол Кюри
Мокшан Кури
Bahasa Melayu Kurium
Malti Kurjum, ²Curju
Nahuatl Curio
Nederlands Curium
norsk Curium
Occitan Curi
ирон Кюрий
polski Kiur
português Cúrio
Runasimi Kuryu
română Curiu
русский Кюрий
slovenčina Curium
slovenščina Kirij
Samoan Kurimi
Samogitian Kioris
shqip Kirium, ²Curiumi
српски Киријум
Southern Sotho Curiamo
svenska Curium
Kiswahili Kuri
தமிழ் கியூரியம்
Tajik Кюрий
ไทย คูเรียม
Türkçe Curiyum
ئۇيغۇرچە كىيۇرىي
українська Кюрій
o‘zbek Kyuriy
Tiếng Việt Curi
Võro Kuurium
中文

History

Discovered In
1944
Discovered By
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Discovered At
USA
Word Origin
Named after Pierre and Marie "Curie"